Quantification of Rifaximin in Tablets by Spectrophotometric Method Ecofriendly in Ultraviolet Region

Table 3

Values determined for the parameter precision of rifaximin work standard by absorption spectrophotometric method in the ultraviolet region.

Concentration (µg mL^−1)	Test	Absorbance values						RSD (%)
		1	2	3	4	5	6
22	Repeatability	0.581	0.587	0.583	0.578	0.586	0.582	0.57 ()
	Intermediate precision	0.584	0.568	0.575	0.574	0.566	0.563	1.08 ()
		0.579	0.580	0.582	0.577	0.561	0.582